The footage was filmed in September at the same location as scenes for Episode VII, on the island of Skellig Michael, off the coast of County Kerry, Ireland.

Del Toro is best known for his roles in Traffic and Guy Ritchie's Snatch and is expected to play a baddie in the new movie, while Dern is famous for her role in 1993's Jurassic Park and her recent Oscar-nominated turn playing Bobbi, the mother of Reese Witherspoon's character in Wild.

They will be joined by relative newcomer Tran, who has appeared in a number of CollegeHumour videos and small roles in TV series like About A Boy.

Many of the Episode VII cast are returning.

Director Johnson is credited as a writer on the new film alongside George Lucas.

Boyega, who will reprise his role as Finn, picked up the EE Rising Star Bafta on Sunday night and confirmed he was due on set just hours after his win.